Life is in complete chaos

Life is getting miserable day by day.
Here is a brief what happened in last few years in my life.I born an boughtup in a middle level family.People in my family are stressed for one or another reason.So no cares and love.I loved a person in school and that person ditched me.After a long pause i suddenly fall in love with a girl.She was so good and caring at first now she is a gf of a rich man and soon they are getting married.Her behaviour towards me changes as she become his gf.She is now status,money minded all the time.There was a time when i became a little sad or annoyed and she hold my face to ask what happened and now even if i cry in front of her she least bother.I am always there when she feels sad or need something.But when ever i call for her she said i will se weather i have time or not.I talked to her about this matter so many times that we are going away from each other but she doesnt care.She is emotional for her bf,her family but why not for me.I am working in a company normal salary but i never ask for anything to her infact i spend money on her if she want something.Problem is not that i am spending money or she is using me.Problem is why she changed all of a sudden,,,no caring ,,no sharing..I felt like i am a nobody for her now yesterday i said tell me clearly if you want me in your life or if you have some doubt then tell me i will go from your life.But she didnt gave any satisfactory answer..Neither yes Nor No.Is it normal what to do..I cant live with her and i cant live without her.Tell me if i can do something so that we become closer again...plz tell